1. It is acceptable for the operator to hold the film in a patient's mouth____.If the patient has a handicapIf the patient or parent grants permissionNeverIf the patient is a childQuestion 1 of 20 2. For estimation of radiographic exposure which of the following is used in badgesLiFNaOBaSO4Al2O3Question 2 of 20 3. Which of the following projections is the best for evaluating the maxillary sinus?Lateral jaw projectionSubmentovertex projectionWaters projectionReverse Towne projectionQuestion 3 of 20 4. Bremsstrahlung radiation results from ____.Electrons interacting with tungsten nucleiX-rays interacting with electronsElectrons interacting with electronsL shell electrons falling into the K shellQuestion 4 of 20 5. It is important that the film base be ____.sensitive to XrayCompletely clearFlexibleopaque Question 5 of 20 6. Which projection is best for examining zygomatic arch fractures?Submentovertex projectionReverse Towne projectionLateral cephalometric projectionWaters projectionQuestion 6 of 20 7. radiographic diagnosis of dense radioopaque cotton wool areas throughout the entire body of the mandible and associated with hypercementosis is most likelyosteomyelitisenostosisexostosispaget's diseaseQuestion 7 of 20 8. Oxygen deficient cells areNo effect of oxygen levelRadioresistantAnticollagenase activityRadiosensitive tissueQuestion 8 of 20 9. SI unit of radioactivity isgrayroentgenbecquerelcurieQuestion 9 of 20 10. Bone death in radiation seen after radiation level of20 Gy50 Gy30 Gy40 GyQuestion 10 of 20 11. The term ALARA refers toOptimizing image qualityReducing patient exposure to as low as is reasonably achievableAs little as Roentgen allowed, an algorithm for limiting patient exposureA legal requirement to optimize occupational exposure in dental radiologyQuestion 11 of 20 12. Penny test is used forPersonnel protectionStrength of developerdarkroom safe lightingStatic electricity artifactQuestion 12 of 20 13. It is generally desirable that x-ray films be all of the following exceptSensitive to visible lightHigh speedCoated with emulsion on both sidesFine grain sizeQuestion 13 of 20 14. ALARA principle stands forAs low as reasonably achievableAs low are resonably achievableAs lower are reasonably achievableAs lower as reasonably achievableQuestion 14 of 20 15. Cervical burnout is phenomenon seen inproximal cariesCervical thin enamelCervical cariesOcclusal cariesQuestion 15 of 20 16. Photoelectric interactions are highest in _____.PulpCementumDentinEnamelQuestion 16 of 20 17. Mandible in single plane is seen inLateral obliqueque OPGPA viewAP viewQuestion 17 of 20 18. Maximum cupping artifact is seen inCone beam computed tomographyMulti size computed tomographyComputed tomographySpiral beam computed tomographyQuestion 18 of 20 19. The radiosensitivity of cells depends on ____.Degree of differentiationMitotic futureMitotic activityAll of the aboveQuestion 19 of 20 20. Film size used to evaluate TMJ10*12 inch5*7 inch4*3 inch8*10 inchQuestion 20 of 20 Loading...
